Phytophthora root and collar disease with lists

Phytophthora root disease is a widespread but often overlooked disease of landscape plants. The name, Phytophthora, is a Greek word literally meaning “plant destroyer.” These organisms grow in the cambium and sapwood causing death of the tissue. Loss of water, nutrient-absorbing capacity, and stored carbohydrate reserves in the root cause a gradual, or sometimes rapid, decline of the above-ground portion of the plant. A list of plants tolerant of poorly drained soils is included in this technical report.